The inherent problem with creating a new browser/platform is getting people to create addons/extensions for it.
If you don’t think Google could do this, think again. Google has an iron grip on the Chromium project.
From the beginning of its time with Google, Android was touted as THE open-source phone operating system. The Android Open Source Project was used by several projects to create their own version of Android.
Then at a certain point, Google introduced an app called Google Play Services. This app is not open source and contains all of the stuff you need to access Google’s services.
there’s a community /c/gemini with some basic information
For starters, you can visit gemini sites through the browser at https://portal.mozz.us
and there is a list of clients (and servers) here:
https://portal.mozz.us/gemini/gemini.circumlunar.space/software/
on iOS I use deedum and on laptop lagrange
some android people can probably recommend a good app and command-line enthusiasts probably have good cli options
here is a another list of resources: https://github.com/kr1sp1n/awesome-gemini
Deedum works on Android too, but there are many other applications if necessary, e.g. Ariane.